Malicious PDF — malware analysis report

Static analysis result for SHA-256 250b18448dd08636…

MALICIOUS

PDF

72.2 KB Created: 2021-03-24 15:50:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d55ceb9284c42d882ed4c465dbd2c20f SHA-1: 527feb10f0cb394ca4dc3902f47cfa28ba08796f SHA-256: 250b18448dd0863603ccc28e9425c81ab57a25f98d629f9a56257556595cf2ff
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://dugedepap.ru/wix?keyword=filmes+online+nacional PDF link annotation
    • http://pasikufopubiwo.mypressonline.com/understanding_comics_chapter_5.pdfIn PDF document text
    • http://jugapus.sportsontheweb.net/sedentarismo_tesis.pdfIn PDF document text
    • http://zomaragexavope.sportsontheweb.net/how_to_use_adobe_premiere_pro_cc_2020.pdfIn PDF document text
    • http://qwertyujg.xyz/zojiri0anw2.pdfIn PDF document text
    • http://wiinorama.fun/3866937444763gru.pdfIn PDF document text
    • http://zootime.store/66676822478x2hu2.pdfIn PDF document text
    • http://heartcenteredequestrian.com/14259755922ygu33.pdfIn PDF document text
    • http://50offshop.pro/puwevoxeleteyn3bo.pdfIn PDF document text
    • http://clipshd.design/kumajisinusezicl0wr.pdfIn PDF document text
    • http://sakaxek.mygamesonline.org/catecismo_de_la_iglesia_catolica_compendio.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvuzonixo.onlinewebshop.net/agile_software_development_principles_patterns_and_practices_martin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03360ad8-ccf5-44e7-b345-99df69d91a8a/gixuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce28bd4-c15a-4716-8c6b-32abecea4ed3/what_is_bitcoin_verification_on_cash_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22dcf533-6389-46cf-bc95-56e35c99779d/88351566273.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9eb7abb7-29b8-4dbb-a5d9-60bf2fb7adcf/dragon_age_origins_rogue_stats_guide.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/bugawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51bd6610-d89f-4552-9979-49536e375266/37871310686.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9143fbd-26a9-4a70-8462-43be3e96ed22/36088539099.pdfIn PDF document text
    • http://gixufedexakav.atwebpages.com/mathematical_physics_by_arfken_free_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD940 4804 bytes
SHA-256: 401b30264f741424e8fe558f655ed31e39b084f970667a385f9567f3b7957569
font_01_sfnt_off0000e984.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE984 13660 bytes
SHA-256: 758bbc2da20a26dc67db100a3dd3c6e14a6d3e4bfd1f10ff63c31c603269c026

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